Steel Goliath Build Log

>>> Steel Goliath Build Log

Glen-L has a ton of plans and great resources for the home builder. Their community of builders is a resourceful bunch and posts are worth reading.

"Aero_dan" is an active farmer who is building a Hankinson Goliath (in steel) in his barn. His blog is frequently updated with his latest endeavors.

I really liked the idea of using pipes for chines and having them double as a keel cooler.

Optimist sailboat build

>>> Optimist sailboat build

Optimist sailboat build

The Optimist has long been being built. It’s designed to be build from 3 sheets of plywood, and to be easy to build. This is a good overview of a group building a boat as part of a summer youth sailing camp. They were able to make sure of a ShopBot CNC machine to cut parts and let the kids do assembly without a lot of the more dangerous cutting equipment.

In 1947 a gentleman named Clark Mills designed a small sail boat for kids to learn to build and sail called the Optimist. This boat was designed to be built from 3 sheets of plywood, with basic woodworking abilities. As time progressed, builders began to modify the boats to gain speed advantages – as happens with all vehicles.

In 1995 the International Optimist Association took the boat back to its roots and a set of dimensions were compiled to retain an exact shape of the boat, so as to remove design advantages from one boat to another. The Optimist is tightly controlled now with over 60 measurements and tolerances of the hull are generally +/- 5 mm. The tolerances do not allow the builder to exploit the possible variations of shape of the hull, but do allow a competent builder to construct a legal racing hull.

Half Moon Bay Yacht Club has a summer youth sailing camp. Through the years we have trained many a young boy or girl to rig and sail the small boats available to us. Normally in an older Laser or Coronado 15. In 2011, the sailing program decided that the Optimist had a place in our sailing fleet to allow the younger kids (7-15) to rig, launch, sail and retrieve the boats themselves while under adult supervision. We set about looking at the building of wood/epoxy Optimist sailing boats. We quickly focused on making racing legal hulls so as to be competitive with other surrounding sailing clubs. This is where the accuracy and repeatability of the ShopBot CNC router at TechShop of Menlo Park became an invaluable tool in our fleet building. I made it at TechShop. Due to the close tolerances allowed, and the desire to have an almost identical fleet of boats, the ShopBot fit the bill to the letter. Once I redrew the plans into CAD drawings and transferred to cut files the different parts of the boats were identical. Each group of people that wanted to build a boat only had small amounts of fitting, beveling and gluing to accomplish, with very little use of dangerous equipment needed and quick progress to show for their efforts, so kids fit right into the task of building boats.

Fun & easy sailboat (model)

>>> Fun & easy sailboat (model)

We are two students from the Technical University of Eindhoven and we are currently working on Protei, an open-source initiative to develop sailing drones to clean the oceans.

We designed and built a sailboat that could be easily adapted to different designs, we also took into account to built it using accessible materials and tools.

We hope that we can contribute to the Protei project by designing a platform that enables people to explore different sailboat designs and sailing principles.

We think that one of the major advantages of open-source is the ability of having a large audience during the development of the project. This is the reason why we are making an Instructable, we are hoping that you will help us in developing an autonomous oil-collecting sailing drone by contributing in one way or another.

Check out the Protei group here: